Signors to the heil co



Mal'h 31, 1931- J. P. HEM. ET AL HORIZONTAL HOIST 3 sheets-sheet 1` Filed OCT,

March 31,1931 J. P. HEIL E'r Al.v 1,793,469

HOI'UZONTAL HOIST Filed oct. 5. 1928 a'srfeets-she'et. 2

5 Sheets-Sheet 3 J. P. HElL ET AL HORIZONTAL HOIST Filed Oct. 5, 192.8

INVENTORS M A TTORNEYS.

March 31; 1931.

Patented Mar. 3l', 1931 UNITED STATES Amrt:

NTA oEFIcE JuLrUs P. HEIL AND CHARLES e. E'ISENBERG, JR.; or lMILWAUKEE, wIscoNs-IN, As-

sIGNoEs 'ro 'rHE HErn ooNsIN CO., OF MILWAUKEE, WISCONSIN, A. CORPORATION F WIS- I HORIZONTAL Horsrr Application led October 5, 1928. Serial No. 310,661.

I This invention relates to improvements in horizontal hoists, ofthe hydraulic type, and

more particularly, although not solely, adapted for operating dump bodies of power driven 5 trucks or other vehicles.

It is-one of the objects of the present in 10 bel used in .connection with any standard make of truck and dump body.

A further object of the invention is to provide ahorizontal hoist which will permit the positioning of the body with relationto the front 'and rear axles of the truck, to more evenly distribute the load thereon and thereby increase the capacity of the truck. A further object of the invention is to provide a horizontal hoist therefore a minimum number of parts and maybe easily mounted on a truck.

A further object of the invention is tol provide a horizontal-hoist which will automatimined' dumping inclination.

'A further object of the invention is to provide a horizontal hoist in which a series of levers are used in connection with a power cylinder for tilting the'body of the truck.

A further object of the invention is to prothe strain on the cylinderpiston and connected levers. A further object of the invention is to provided a horizontal hoist which is'arranged-tov automaticallystop when the piston" has reachedits outermost position.

A further object of the inventionv is' to provide a horizontal hoist of the hydraulic type in which provision is made wit in the `cylinders for taking care of the excess oil when the piston is in its innermost position.

to initially move-inwardly.v

which isa unitary '20 structure, and 1s self-contained', and has cally stop the further tilting of the truckbody when said body reaches its predeter- 'pivot brackets 9. l

lends lof said arms are pivotally connected to the bracket members 12.- Said bracket mem- A further object of the invention is to provide a horizontal hoist of the Huid type having means for by-passing the oil from one side of the piston lto the other to permit the piston A further object of the invention is to provide a horizontal hoist which isof simple construction, is strong and durable and is well adapted forthe purpose described.

Withthe above and other objects in view, the invention consists of the improved horizontal hoist and its parts and combinations as set forth in the claims and all equivalents thereof. l Inthe accompanyingdrawings in which .the samere-ference characters indicate the same parts in all of the views:

Fig. 1 is a side view oi:` .ay motor truck having the improved horizontal hoist mounted thereon, parts broken away and other parts beingshown in section, the view also illustrat-ing by dotted Alines the body portion of the truck in its upper position;

Fig. 2 is a top view of a portion of the truck body and the horizontal hoist mounted there- 011;

Fig. 3 is a central vertical sectional view of the cylinder and its connected parts taken on a larger scale; and

Fig. 4 is a sectional detail view taken-'on' line 4-4 of Fig. 3.

. Referring to the drawings, the reference numeral 5 indicates a 'portion ofk a motor truck,6 theside members of the chassi'sor frame, 7 thecab or seat portion and 8 the tiltable load carrying body of the truck. -Said body' near its rear end portion is pivotally connected to the opposite side members 6 by The improved horizontal hoist comprises 99 preferably a single cylinder 10 to the forward opposite side portions of which curved side arms 1l are rigidly secured,and the forward y bers 12 are mounted on the opposite sidev members 6. The cylinder extends 1n ap roxi- Y mately a-horizontal'line and is rovide with .'apiston 13 reciprocally. positloned therein. piatonrod 145conn-eetmi at its forward end 19 to the piston 13 extends through the head 15 of the cylinder and at its outer end is provided with an extension 16 having a part` spherical portion 17 and a bolt portion 18 engaged by a nut 19. The bolt portion 18 extends through a tapered opening 20 formed in a medial portion of a yoke member 21 and thespherical portion 17 of the extension 16 extends into a part-spherical socket 22 of the yoke to permit a slight amount of angular adjustment between the extension and the yoke and thus compensates for weaving of the truck chassis. The yoke extends around the rear end and opposite side portions of the cylinder and the end portions thereof are pivotally connected to medial' portions of lever arms 23 by pivot pins 24. The lever arms at their rearward ends are pivotally connected to a transverse shaft 25 which is mounted in brackets 26 secured to the opposite side members 6. Rods 27 connected respectively to the brackets 12 and 26 on the side portions 6 brace said brackets in pairs on each side of the chassis, as clearly shown in Figs. 1 and 2.

The forward ends of the leverarms 23 are formed with elongated slots 28 for receiving anti-friction rollers 29 carried by the slotted or bifurcated lower end portions 30 of links 31. For strength the lower portions of the bifurcated ends may be joined together by small transverse parts 32.

The said bifurcated portions are formed with elongated slotsy 33 for receiving transverse pins 34 which are rigidly connectedto the lever arms 23. The upper ends of the links 31 are journaled on a transverse shaft 35 which is mounted in brackets 36 connected to the opposite sides of the body portion 8.

.The lever arms 23 and the links 31 swing upwardly to elevatethe body, and to compensate for the relative, movements between the lever arms, the links and the slots 28 and 33, said slots are of curved formation, as clearly indicated in Figs.F 1 and 3, to permit the rollers 29 to move from the inner ends to the outer ends of the slots 28 and the pins 34 tomove from the upper ends to the lower ends of the slots 33. This feature of the hoist permits a greater lift of the body with less downward movement of the links. and levers to provide greater ground clearance.

The cylinder 10 is formed with a forward duct or port 35 and a rear duct or port 36 which respectively charge or discharge the.

fluid medium from the cylinder to the front or to the rear of the piston. The port 36 is in communication with a duct 37 formed in the lower wall of the cylinder and extends fthe length of the cylinder. The forward head38 is provided with a rotary pump 39, a transversev rotary plug valve 40 and a ball checkvalve 41. y

A duct 42 connects the cylinder duct 37 with the chamber of the pump 39 and the ball valve 41 is positioned within the duct 35 which connects the chamber of the pump to the cylinder 10'in front of the piston. The ball valve 41 is spring actuated and bears against a seat 43 and is opened by the oil in the cylinder when under pressure from the pump to move the piston rearwardly.

The transverse -rotary valve 40 is formed with a duct 44 and the said valve may be manually turned to register its port with the by-pass ducts 45 and 45 when it is desired to by-pass the oil from one side of the piston to the other without the oil passing through the pump. The pump is provided with a downwardly extending arm 46 to which a rod 47 is connected and said rod extends forwardly and is connected to a leverarm control 48 extending upwardly into the cab 7 of the truck.

The'pump l39 is of the ordinary two gear type and one of the gears is provided with a shaft 49 having a universal )oint connection 50 with a shaft 51 extending to a power takeoff 52 of the transmission 53 of the truck. The universal connection of the pum shaft permits the upward movement of t e cylinder and the downward swing of the forward end of the pump shaft in tilting the truck body. The o eration of the power take-off is controlled y a lever 54 extending into the cab and connected to the said power take-ofi' by a rod 55. I

As considerable space within the cylinder is required to accommodate the piston rod 14 when it is in its inner position than when in its outer position and to suppl the varying amounts, the rear portion of the cylinder is provided with an oil chamber 56 which comprises an enlargement vof the cylinder and is open to the bore thereof the full diameter of said bore. Said head 15 of the cylinder is provided with an inward extension having a cup-shaped end 57 which terminates'a slight distance short of the bore of the cylinder to prevent the oil splashing into the chamber whenthe piston is moving outwardly. An opening 57 is also formed in the cup-shaped extensiop 57 to permit the more free flow of oil to and from the bore of the cylinder. Said chamber isalso in communication with the duct or port 36 by means ofl a by-pass duct 58. A spring actuated ball check valve 59 is positidned in the duct 58 to permit the oil to flow from the forward side of the pis-4 ton through the plug valve 40 and the ducts 42, 37, 58 and 58 andvinto the oil chamber 56 when the piston in its outer position covers the duct 36and initially starts its forward movementl in the cylinder to lower the body. The oil chamber 56 is provided with an air ventvin the form of an outwardly opening check valve 60 threaded into the upper portion of the cylinder.

i In use the hoist ismounted on a motor truck in approximately a. horizontal position and between the truck chassis andthe body,

as clearly shown in Fig. 1, and when it is de sirable to dump the contents of .the truck body the-transmission controlling rod is operated to transmit motion from the transmission to vthe pump, and the operation of the pump will draw the fluid'medium or oil from the rear of the piston and force it into the bore of the-cylinder in-front of the piston and force said piston outwardly. VThe outward movement of the piston will swingthe lever arm and the link upwardly end of the link is connected to the body it will v Atilt the body and dump the contents thereof.

When the piston has reached its outer position and in which position it closes the port x or .duct 36', further movement of the piston will be automatically stopped, as the further sired to lower. the truck body the valve rod 4:7 is operated to open the valve 40' and when opened the oil in the cylinder will flow through the ducts 58, 58 and 37 until the pisthe lever arm, said connection including aton uncovers the duct 36', and when uncovered the oil will flow. directly through the duct 36" and into the cylinder to the rear of the piston, and when the excess oil is forced out of the bore of the cylinder in front of the piston the excess -oil will overiiow the upper portion of the bore and into the oil chamber at therear ofthe. cylinder. -The speed of lowering the truck body is controlled by opening or closing more r liess of the port or duct ofthe valve. v

It is to be understood thatany kind ofa powermedium may be used in lieu of the cylinder, or that-any number of cylinders and pistons may be .used without departing from the spirit, and scope ofthe invention.

From the foregoing description it will be seen that the horizontal hoist is of very simple construction, is strong and 'durable and vis well adapted for thepurpose described.

What we claim as our invention is: 1. The combination with a motor truck having a dump body, of a means for tilting said body, comprising alever arm pivoted to the truck, a link pivotally connectedto thedump body and having a connection with pivot carried by each of the connected elements and movable laterally within a slot in'the other, and an approximately horizontally extending power means pivotally connected to the truck and having a pivotal i connection with thelever arm for tilting said and as the upper `within slots in the other,

2. .The combination with a motor. truck having a pivoted dump body, of a means for tilting said body, comprising lever arms pivoted vat their rear end portions to the truck,

links pivotally connected at their upper ends tothe body and dependingl downwardly therefrom and at' their lower end portions pivotally connected tothe front end portions of the lever arms, said pivotal connections includingconcentric pivots carried by each. of the connected elements and movablelaterally within slots in the other, and a power means pivotally connected' to the truck and to medial portions 'ofthe lever arms for tilting said body.

3. The combination with a motor truck having a rearwardly tilting body, of a means for tilting said body, comprising spaced apartlever arms pivoted at their rear end portions to the truck, spaced apart links pivotally connected at their upper ends tothe body and depending downwardly therefrom l and pivotally connected at their lower end portions to the front end portions of the lever arms, said pivotal connections including concentric pivots carried by each of the connected elements and movable laterally and a power instrumentality interposed between the lever arms and the links and having a pivotal connection withthe truck, the said instrumentality having a rearwardly movablemember which is pivotally connected to medial por-- tions of the lever arms for tilting the body.

4.. The combination with a motor t-ruck having a tiltable body, of a means 4for tilting said body, comprising spaced apart lever arms pivoted at their rear end yportions to the truck, spaced apart links pivotally con-` nected at their upper ends to the body and depending downwardly therefrom and at their lower ends having alined pivots movable laterally within alined slots in the forward end portions of the lever arms, an approximately horizontal cylinder pivotally connected at its forward end portion to the opposite side portions of the truck, a yoke extending around the rear end portionof the .cylinder and pivotally connected to medial .portions of the lever arms, a pistonwithin the cylinder and having a piston rod which extends rearwardly through the cylinder and is connected at its rear end to a medial portionof the yoke, and 'means driven by the motor of the truck for operating the piston to tilt the truck body.

A5. The combination with a motor truck ,having a tiltable body, of a means for tilting said body, comprising spaced apart lever arms pivoted attheir rear end portions to the truck, spaced apart links pivotally connected at their upper ends to the body and depending downwardly therefrom and at their lower ends having alined pivots movable laterally within alinedslots in the forward end portions of the lever arms, an approximately horizontal cylinder pivotally connected at its forward end portion to the opposite side portions of the truck, a yoke extending around the rear 5 end and opposite side portions of the cylinder and pivotally connected at its end portions to medial portions of the 4lever arms, a piston within the cylinder and having a iston rod whichv extends rearwardly througii the cylm inder and has a movable connection with a medial portion of the yoke, and means driven by the motor of the truck for reciprocating the piston and its rod to tilt the truck body.

6. The combination with a motor truck having a dump body, of means for tilting said body, comprising a lever element pivoted to the truck, a link element pivoted to the body,

, a connection between said elements including a pin carried by each element and movable laterally within a curved slot in the other,

a cylinder pivotally connected at its forward end to the truck, a pistonwithin the cylinder x and having a piston rod pivotally associated ywith the body, and means driven by the motor of the truck for operating the piston to tilt the body. Q

7. The combination with a motor truck having a dump body, of means for tilting said body, comprising a lever element pivoted to the truck, a link element pivoted to the body,

`a connection between said elements" including a pin carried by each element and movable laterally within a slot inthe other, and power means operable by the motor of the truck and pivotally connected to the truck and to said lever element for tilting the body.

8. The combination with a motor truck havinga dump body, of means for tilting said body, comprising a lever element pivoted to the truck, a link element pivoted to the body, a connection between said elements including a pin carried by each element and movable laterally within a curved slot in' the other, and power means pivotally connected, to the truck and to said lever element`for tilting the body. f

In testimony whereof, we aix our signatures.

JULIUS P. HEIL. CHARLES G. EISENBERG, JR. 

